Nintendo shares, which trade on the Tokyo exchange, are down on Tuesday after data from SensorTower showed its newest game was downloaded 15 million times in its first week of availability.

Nintendo is trading down about 1.34% after "Animal Crossing: Pocket Camp" recorded 15 million downloads in its first six days. The company's "Super Mario Run" attracted 32 million downloads in its first six days, according to data from Sensor Tower.

The new "Animal Crossing" game operates on a "freemium" model like a lot of other popular, and highly-grossing, apps. The game is free to play but offers certain items and the option to speed up gameplay elements by purchasing in-game currency.

The game reached as high as the fifth highest-grossing app spot in the Japanese app store and is currently ranked number 10, according to SensorTower. In the US, the game reached as high as 72 in the highest-grossing list.

Nintendo executives are putting a lot of emphasis on nailing their mobile game offerings, and the company has learned a lot from its first two games, Jefferies has said previously. The company's intellectual property is strong and underestimating it could be a mistake, and the driver of success for "Animal Crossing" will be how well it is monetized.

Nintendo is up 92.32% this year, and was trading at about 47,080 yen a share Tuesday morning.